Role of delayed Tc-99m HMPAO labeled leukocyte scintigraphy in the diagnosis of coronary mycotic aneurysm.

Coronary mycotic aneurysms are rare with a poor prognosis. Atherosclerosis often predisposes to aneurysmal dilatation. In children, Kawasaki disease and in adults trauma, vasculitis, syphilis, dissection, and postcoronary angioplasty contribute to coronary mycotic aneurysms. Radiolabeled leukocytes have been used in the diagnosis of prosthetic valve endocarditis and vascular graft infections. Abnormal accumulation of radiolabeled leukocytes have also been reported in infra renal aortic aneurysms. We present a case of a coronary mycotic aneurysm where delayed Tc-99m HMPAO labeled leukocyte imaging played an important role leading to the diagnosis.